Unthankfulness : কৃতঘ্নতা;
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Bad at (অদক্ষ): He is not bad at English.
Hope for (আশা করা): Let us hope for the best.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
Welcome to (স্বাগত জানানো): You are welcome to our new office.
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Idioms
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.